#231CB4#231CB4

#231CB4 is a dark, highly saturated blue. Relative luminance 0.045; OKLCH L 37.9% C 0.221 H 270.7°. Best body text is #FFFFFF at 11.07:1 contrast (WCAG AA passes).

Color values

HEX	#231CB4
RGB	rgb(35, 28, 180)
HSL	hsl(243, 73%, 41%)
HSV	hsv(243, 84%, 71%)
CMYK	cmyk(80.6%, 84.4%, 0%, 29.4%)
CIE-LAB	lab(25.20, 53.16, -76.31)
CIE-LCH	lch(25.20, 93.00, 304.86°)
OKLab	oklab(37.87% 0.0027 -0.2208)
OKLCH	oklch(37.87% 0.221 270.7)
XYZ	xyz(9.3438, 4.4820, 43.5438)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231CB4 #ADB41C

analogous

#1C61B4 #231CB4 #6F1CB4

triadic

#231CB4 #B4231C #1CB423

tetradic

#231CB4 #B41C61 #ADB41C #1CB46F

square

#231CB4 #B41C61 #ADB41C #1CB46F

split-complementary

#231CB4 #B46F1C #61B41C

monochromatic

#0E0C4A #19147F #231CB4 #372FDF #6A64E7

Accessibility & contrast

On white

11.07

#231CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#231CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231CB4

11.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231CB4	#FFFFFF	#000000	##FFFFFF
##231CB4	1.00	11.07	1.90	11.07
#FFFFFF	11.07	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B8

Deuteranopia (green-blind)

#0034B2

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #231cb4;
/* rgb */ color: rgb(35, 28, 180);
/* oklch */ color: oklch(37.9% 0.221 270.7);

Tailwind

colors: {
  custom: {
    50: '#7b5ecc',
    500: '#231cb4',
    950: '#000000',
  },
}

SCSS

$custom: #231cb4;
$custom-light: #7b5ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#231cb4",
  "rgb": {
    "r": 35,
    "g": 28,
    "b": 180
  },
  "hsl": {
    "h": 242.763,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.37872,
    "c": 0.22082,
    "h": 270.7
  },
  "luminance": 0.04483
}

Semantic roles & 50–950 ramp

primary

#231CB4

secondary

#C7CC60

accent

#F038E7

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #231CB4

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →